Easy to make homemade Paintball Gun\rbr\rbrDrinking Bottle- $1.00\rbrBubbles Tube- $1.00\rbrHair Spray- $1.50\rbrGrill Lighter- $3.50 -Total $7.00\rbr\rbrThis paintball gun works by igniting a mixture of hairspray and air inside of a closed container and the small explosion produced forces the paintball down and out the barrel, Its basically like a mini potato gun.